An analyst has a set of normally distributed intervally scaled data resulting from two observations on the same sample of subjects, and he wishes to investigate if there is any difference in these two means. The appropriate statistical procedure is
A) z-test for difference in two means.
B) Analysis of variance (ANOVA).
C) paired samples t-test.
D) chi-square goodness-of-fit test.
E) regression analysis.

Question

Quizplus · Accepted Answer

The paired samples t-test is used to compare the means of two related groups, such as the same subjects measured at two different times.

An Analyst Has a Set of Normally Distributed Intervally Scaled